@media screen and (max-width: 768px) {
  .product .function {
    flex-direction: column;
    height: 150px;
  }
  .product .function .btn {
    width: 100%;
    padding-top: 40px;
  }
  .product .function .btn .item {
    width: 20%;
    margin: 0 1%;
    border: none;
  }
  .product .function .search {
    margin-bottom: 20px;
  }
}
@media screen and (max-width: 540px) {
  .product .function {
    flex-direction: column;
    height: 180px;
    border-bottom: none;
  }
  .product .function .btn {
    width: 100%;
    padding-top: 40px;
    margin-left: 15%;
  }
  .product .function .btn .item {
    width: 30%;
    border: none;
    margin: 15px;
  }
  .product .function .search {
    display: none;
  }
  .product .function .dissolve {
    display: block;
  }
}
